69 lines
1.1 KiB
ArmAsm
69 lines
1.1 KiB
ArmAsm
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/* Trampoline for calling outside of etherboot */
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.text
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.globl __call
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.proc __call
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__call:
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alloc loc0=ar.pfs,8,3,8,0 /* in, local, out, rotating */
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mov loc1=rp
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mov loc2=gp
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ld8 r14=[in0],8
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;;
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ld8 gp=[in0]
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mov r28=in1 /* So we can use stacked pal calling conventions */
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mov out0=in1
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mov out1=in2
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mov out2=in3
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mov out3=in4
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mov out4=in5
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mov out5=in6
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mov out6=in7
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mov out7=0 /* So we can work with sal calling conventions */
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mov b6=r14
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;;
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br.call.sptk.few rp=b6
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;;
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rsm psr.i /* disable interrupts */
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;;
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mov gp=loc2
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mov rp=loc1
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;;
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mov ar.pfs=loc0
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br.ret.sptk.many rp
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.size __call, . - __call
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.endp __call
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.text
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.globl pal_call
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.proc pal_call
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pal_call:
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alloc loc0 = ar.pfs,4,3,0,0 /* in, local, out, rotating */
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mov loc1 = rp
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mov loc2 = gp
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add r8 = @gprel(pal_entry),gp
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add r9 = @gprel(pal_ret),gp
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;;
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ld8 r14 = [r8]
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;;
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mov r28 = in0
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mov r29 = in1
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mov r30 = in2
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mov r31 = in3
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mov b6 = r14
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mov rp = r9
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rsm psr.i /* disable interrupts */
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;;
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br.sptk.few b6
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;;
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pal_ret:
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rsm psr.i /* disable interrupts */
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;;
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mov gp=loc2
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mov rp=loc1
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;;
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mov ar.pfs=loc0
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br.ret.sptk.many rp
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